<!DOCTYPE html>
<html lang="en-US">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>set_drawing_object_callback [HALCON算子参考手册]</title>
<style type="text/css">
      body {
    color: #000000;
    background-color: #ffffff;
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
}

.body_main {
    margin-left: 35px;
    margin-right: 35px;
}

@media screen and (min-width:992px) {

    .body_main {
        margin-left: 10%;
        margin-right: 10%;
    }

    table.toctable {
        width: 80%
    }
}

@media screen and (min-width:1400px) {

    .body_main {
        margin-left: 15%;
        margin-right: 15%;
    }

    table.toctable {
        width: 70%
    }
}

body>div ul ul {
    margin-left: inherit;
}

a:link {
    color: #0044cc;
}

a:link,
a:visited {
    text-decoration: none;
}

a:link:hover,
a:visited:hover {
    text-decoration: underline;
}

th {
    text-align: left;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    text-rendering: optimizeLegibility;
    color: #666666;
}

code {
    font-family: monospace,monospace;
}

h1 a.halconoperator {
    font-family: Arial, Helvetica, sans-serif;
    color: #666666;
}

h2 a.halconoperator {
    font-family: Arial, Helvetica, sans-serif;
    color: #666666;
}

hr {
    border: 0;
    border-top: solid 1px #f28d26;
}

.pre {
    display: block;
    padding-bottom: 1ex;
    font-family: monospace;
    white-space: pre;
}

pre {
    font-family: monospace, monospace;
    padding: 1ex;
    white-space: pre-wrap;
}

.toc {
    font-size: 80%;
    border-top: 1px dashed #f28d26;
    border-bottom: 1px dashed #f28d26;
    padding-top: 5px;
    padding-bottom: 5px;
}

.inv {
    margin: 0;
    border: 0;
    padding: 0;
}

.banner {
    color: #666666;
    padding-left: 1em;
}

.logo {
    background-color: white;
}

.keyboard {
    font-size: 80%;
    padding-left: 3px;
    padding-right: 3px;
    border-radius: 5px;
    border-width: 1px;
    border-style: solid;
    border-color: #f28d26;
    background-color: #f3f3f3;
}

.warning {
    margin-top: 2ex;
    margin-bottom: 1ex;
    padding: 10px;
    text-align: center;
    border: 1px solid;
    color: #bb0000;
    background-color: #fff7f7
}

.imprint {
    margin-top: 1ex;
    font-size: 80%;
    color: #666666;
}

.imprinthead {
    font-weight: bolder;
    color: #666666;
}

.indexlink {
    text-align: right;
    padding-bottom: 5px;
}

.postscript {
    margin-top: 2ex;
    font-size: 80%;
    color: #666666
}

.evenrow {
    background-color: #e7e7ef;
    vertical-align: top;
}

.oddrow {
    background-color: #f7f7ff;
    vertical-align: top;
}

.headrow {
    background-color: #97979f;
    color: #ffffff;
    vertical-align: top;
}

.logorow {
    vertical-align: top;
}

.error {
    color: red;
}

.var {
    font-style: italic
}

.halconoperator {
    font-family: monospace, monospace;
}

span.operator {
    font-family: monospace, monospace;
}

span.procedure {
    font-family: monospace, monospace;
}

span.operation {
    font-family: monospace, monospace;
}

span.feature {
    font-family: Arial, Helvetica, Homerton, sans-serif;
}

ul {
    padding-left: 1.2em;
}

li.dot {
    list-style-type: square;
    color: #f28d26;
}

.breadcrumb {
    font-size: 80%;
    color: white;
    background-color: #062d64;
    margin-bottom: 20px;
    padding-left: 35px;
    padding-right: 35px;
    padding-bottom: 15px;
}

.webbar {
    font-size: 80%;
    background-color: #dddddd;
    margin-top: 0px;
    margin-left: -35px;
    margin-right: -35px;
    margin-bottom: 0px;
    padding-top: 5px;
    padding-left: 35px;
    padding-right: 35px;
    padding-bottom: 5px;
}

.footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    border-top: 1px dashed #f28d26;
    font-size: 80%;
    color: #666666;
    padding-bottom: 8px;
}

.footer .socialmedia a {
    padding-left: 7px;
}

.socialmedia {
    padding-top: 10px;
}

.copyright {
    margin-top: 19px;
}

.breadcrumb a {
    color: #ffffff;
    border-bottom: 1px solid white;
}

.breadcrumb a:link:hover,
.breadcrumb a:visited:hover {
    text-decoration: none;
    border-bottom: none;
}

.heading {
    margin-top: 1ex;
    font-size: 110%;
    font-weight: bold;
    color: #666666;
}

.text {
    color: black;
}

.example {
    font-size: 80%;
    background-color: #f3f3f3;
    border: 1px dashed #666666;
    padding: 10px;
}

.displaymath {
    display: block;
    text-align: center;
    margin-top: 1ex;
    margin-bottom: 1ex;
}

.title {
    float: left;
    padding-top: 3px;
    padding-bottom: 3px;
}

.signnote {
    font-family: Arial, Helvetica, Homerton, sans-serif;
    font-size: 80%;
    color: #666666;
    font-weight: lighter;
    font-style: italic
}

.par {
    margin-bottom: 1.5em;
}

.parhead {
    text-align: right;
}

.parname {
    float: left;
}

.pardesc {
    font-size: 85%;
    margin-top: 0.5em;
    margin-bottom: 0.5em;
    margin-left: 2em;
}

.parcat {
    color: #666;
    font-weight: bold;
}

*[data-if=cpp],
*[data-if=c],
*[data-if=dotnet],
*[data-if=com],
*[data-if=python] {
    display: none;
}

.tabbar {
    text-align: right;
    border-bottom: 1px solid #f28d26;
    margin-bottom: 0.5em;
}

ul.tabs {
    padding-top: 3px;
    padding-bottom: 3px;
    margin-top: 10px;
    margin-bottom: 0;
    font-size: 80%
}

ul.tabs li {
    padding-top: 3px;
    padding-bottom: 3px;
    display: inline;
    overflow: hidden;
    list-style-type: none;
    margin: 0;
    margin-left: 8px;
    border-top: 1px solid #666;
    border-left: 1px solid #666;
    border-right: 1px solid #666;
}

ul.tabs li.active {
    border-left: 1px solid #f28d26;
    border-right: 1px solid #f28d26;
    border-top: 1px solid #f28d26;
    border-bottom: 1px solid #fff;
}

ul.tabs li.inactive {
    background-color: #eee;
}

ul.tabs li a {
    padding-left: 5px;
    padding-right: 5px;
    color: #666;
}

ul.tabs li a:link:hover {
    text-decoration: none;
}

ul.tabs li.inactive a {
    color: #666;
}

ul.tabs li.active a {
    color: black;
}

dl.generic dd {
    margin-bottom: 1em;
}

.pari {
    color: olive;
}

.paro {
    color: maroon;
}

.comment {
    font-size: 80%;
    color: green;
    white-space: nowrap;
}

table.grid {
    border-collapse: collapse;
}

table.grid td {
    padding: 5px;
    border: 1px solid;
}

table.layout {
    border: 0px;
}

table.layout td {
    padding: 5px;
}

table.table {
    border-collapse: collapse;
}

table.table td {
    padding: 5px;
    border-left: 0px;
    border-right: 0px;
}

table.table tr:last-child {
    border-bottom: 1px solid;
}

table.table th {
    padding: 5px;
    border-top: 1px solid;
    border-bottom: 1px solid;
    border-left: 0px;
    border-right: 0px;
}

.details_summary {
    cursor: pointer;
}

table.toctable {
    width: 100%;
}

table.toctable col:first-child {
    width: 20%;
}

table.toctable col:nth-last-child(2) {
    width: 8%;
}

table.altcolored tr:nth-child(even) {
    background-color: #f3f3f3;
}

    </style>
<!--OP_REF_STYLE_END-->
<script>
    <!--
var active_lang='hdevelop';function switchVisibility(obj,active_lang,new_lang)
{var display_style='inline';
for(var i=0;i<obj.length;i++)
{if(obj.item(i).getAttribute('data-if')==new_lang)
{obj.item(i).style.display=display_style;}
if(obj.item(i).getAttribute('data-if')==active_lang)
{obj.item(i).style.display='none';}}
return;}
function toggleLanguage(new_lang,initial)
{if(active_lang!=new_lang)
{var lis=document.getElementsByTagName('li');for(var i=0;i<lis.length;i++)
{if(lis.item(i).id=='syn-'+new_lang)
{lis.item(i).className='active';}
else
{lis.item(i).className='inactive';}}
var divs=document.getElementsByTagName('div');var spans=document.getElementsByTagName('span');switchVisibility(divs,active_lang,new_lang);switchVisibility(spans,active_lang,new_lang);if(!initial)
{setCookie("halcon_reference_language",new_lang,null,null);}
active_lang=new_lang;}
return;}
function setCookie(name,value,domain,exp_offset,path,secure)
{localStorage.setItem(name,value);}
function getCookie(name)
{return localStorage.getItem(name);}
function initialize()
{var qs=location.href.split('?')[1];var qs_lang_raw=location.href.split('interface=')[1];var qs_lang;if(qs_lang_raw)
{qs_lang=qs_lang_raw.split('#')[0];}
var cookie_lang=getCookie("halcon_reference_language");var new_lang;if((qs_lang=="hdevelop")||(qs_lang=="dotnet")||(qs_lang=="python")||(qs_lang=="cpp")||(qs_lang=="c"))
{new_lang=qs_lang;setCookie("halcon_reference_language",new_lang,null,null);}
else if((cookie_lang=="hdevelop")||(cookie_lang=="dotnet")||(cookie_lang=="python")||(cookie_lang=="cpp")||(cookie_lang=="c"))
{new_lang=cookie_lang;}
else
{new_lang="hdevelop";}
toggleLanguage(new_lang,1);return;}
-->

  </script>
</head>
<body onload="initialize();">
<div class="breadcrumb">
<br class="inv"><a href="index.html">目录</a> / <a href="toc_graphics.html">图形</a> / <a href="toc_graphics_object.html">Object</a><br class="inv">
</div>
<div class="body_main">
<div class="tabbar"><ul class="tabs">
<li id="syn-hdevelop" class="active"><a href="javascript:void(0);" onclick="toggleLanguage('hdevelop')" onfocus="blur()">HDevelop</a></li>
<li id="syn-dotnet" class="inactive"><a href="javascript:void(0);" onclick="toggleLanguage('dotnet')" onfocus="blur()">.NET</a></li>
<li id="syn-python" class="inactive"><a href="javascript:void(0);" onclick="toggleLanguage('python')" onfocus="blur()">Python</a></li>
<li id="syn-cpp" class="inactive"><a href="javascript:void(0);" onclick="toggleLanguage('cpp')" onfocus="blur()">C++</a></li>
<li id="syn-c" class="inactive"><a href="javascript:void(0);" onclick="toggleLanguage('c')" onfocus="blur()">C</a></li>
</ul></div>
<div class="indexlink">
<a href="index_classes.html"><span data-if="dotnet" style="display:none;">类别</span><span data-if="cpp" style="display:none;">类别</span></a><span data-if="dotnet" style="display:none;"> | </span><span data-if="cpp" style="display:none;"> | </span><a href="index_by_name.html">算子列表</a>
</div>
<!--OP_REF_HEADER_END-->
<h1 id="sec_name">
<span data-if="hdevelop" style="display:inline;">set_drawing_object_callback</span><span data-if="c" style="display:none;">T_set_drawing_object_callback</span><span data-if="cpp" style="display:none;">SetDrawingObjectCallback</span><span data-if="dotnet" style="display:none;">SetDrawingObjectCallback</span><span data-if="python" style="display:none;">set_drawing_object_callback</span> (算子名称)</h1>
<h2>名称</h2>
<p><code><span data-if="hdevelop" style="display:inline;">set_drawing_object_callback</span><span data-if="c" style="display:none;">T_set_drawing_object_callback</span><span data-if="cpp" style="display:none;">SetDrawingObjectCallback</span><span data-if="dotnet" style="display:none;">SetDrawingObjectCallback</span><span data-if="python" style="display:none;">set_drawing_object_callback</span></code> — Add a callback function to a drawing object.</p>
<h2 id="sec_synopsis">参数签名</h2>
<div data-if="hdevelop" style="display:inline;">
<p>
<code><b>set_drawing_object_callback</b>( :  : <a href="#DrawHandle"><i>DrawHandle</i></a>, <a href="#DrawObjectEvent"><i>DrawObjectEvent</i></a>, <a href="#CallbackFunction"><i>CallbackFunction</i></a> : )</code></p>
</div>
<div data-if="c" style="display:none;">
<p>
<code>Herror <b>T_set_drawing_object_callback</b>(const Htuple <a href="#DrawHandle"><i>DrawHandle</i></a>, const Htuple <a href="#DrawObjectEvent"><i>DrawObjectEvent</i></a>, const Htuple <a href="#CallbackFunction"><i>CallbackFunction</i></a>)</code></p>
</div>
<div data-if="cpp" style="display:none;">
<p>
<code>void <b>SetDrawingObjectCallback</b>(const HTuple&amp; <a href="#DrawHandle"><i>DrawHandle</i></a>, const HTuple&amp; <a href="#DrawObjectEvent"><i>DrawObjectEvent</i></a>, const HTuple&amp; <a href="#CallbackFunction"><i>CallbackFunction</i></a>)</code></p>
<p>
<code>void <a href="HDrawingObject.html">HDrawingObject</a>::<b>SetDrawingObjectCallback</b>(const HTuple&amp; <a href="#DrawObjectEvent"><i>DrawObjectEvent</i></a>, const HTuple&amp; <a href="#CallbackFunction"><i>CallbackFunction</i></a>) const</code></p>
<p>
<code>void <a href="HDrawingObject.html">HDrawingObject</a>::<b>SetDrawingObjectCallback</b>(const HString&amp; <a href="#DrawObjectEvent"><i>DrawObjectEvent</i></a>, void* <a href="#CallbackFunction"><i>CallbackFunction</i></a>) const</code></p>
<p>
<code>void <a href="HDrawingObject.html">HDrawingObject</a>::<b>SetDrawingObjectCallback</b>(const char* <a href="#DrawObjectEvent"><i>DrawObjectEvent</i></a>, void* <a href="#CallbackFunction"><i>CallbackFunction</i></a>) const</code></p>
<p>
<code>void <a href="HDrawingObject.html">HDrawingObject</a>::<b>SetDrawingObjectCallback</b>(const wchar_t* <a href="#DrawObjectEvent"><i>DrawObjectEvent</i></a>, void* <a href="#CallbackFunction"><i>CallbackFunction</i></a>) const  <span class="signnote">
            (
            Windows only)
          </span></code></p>
</div>
<div data-if="com" style="display:none;"></div>
<div data-if="dotnet" style="display:none;">
<p>
<code>static void <a href="HOperatorSet.html">HOperatorSet</a>.<b>SetDrawingObjectCallback</b>(<a href="HTuple.html">HTuple</a> <a href="#DrawHandle"><i>drawHandle</i></a>, <a href="HTuple.html">HTuple</a> <a href="#DrawObjectEvent"><i>drawObjectEvent</i></a>, <a href="HTuple.html">HTuple</a> <a href="#CallbackFunction"><i>callbackFunction</i></a>)</code></p>
<p>
<code>void <a href="HDrawingObject.html">HDrawingObject</a>.<b>SetDrawingObjectCallback</b>(<a href="HTuple.html">HTuple</a> <a href="#DrawObjectEvent"><i>drawObjectEvent</i></a>, <a href="HTuple.html">HTuple</a> <a href="#CallbackFunction"><i>callbackFunction</i></a>)</code></p>
<p>
<code>void <a href="HDrawingObject.html">HDrawingObject</a>.<b>SetDrawingObjectCallback</b>(string <a href="#DrawObjectEvent"><i>drawObjectEvent</i></a>, IntPtr <a href="#CallbackFunction"><i>callbackFunction</i></a>)</code></p>
</div>
<div data-if="python" style="display:none;">
<p>
<code>def <b>set_drawing_object_callback</b>(<a href="#DrawHandle"><i>draw_handle</i></a>: HHandle, <a href="#DrawObjectEvent"><i>draw_object_event</i></a>: MaybeSequence[str], <a href="#CallbackFunction"><i>callback_function</i></a>: MaybeSequence[int]) -&gt; None</code></p>
</div>
<h2 id="sec_description">描述</h2>
<p><code><span data-if="hdevelop" style="display:inline">set_drawing_object_callback</span><span data-if="c" style="display:none">set_drawing_object_callback</span><span data-if="cpp" style="display:none">SetDrawingObjectCallback</span><span data-if="com" style="display:none">SetDrawingObjectCallback</span><span data-if="dotnet" style="display:none">SetDrawingObjectCallback</span><span data-if="python" style="display:none">set_drawing_object_callback</span></code> adds the callback function
<a href="#CallbackFunction"><i><code><span data-if="hdevelop" style="display:inline">CallbackFunction</span><span data-if="c" style="display:none">CallbackFunction</span><span data-if="cpp" style="display:none">CallbackFunction</span><span data-if="com" style="display:none">CallbackFunction</span><span data-if="dotnet" style="display:none">callbackFunction</span><span data-if="python" style="display:none">callback_function</span></code></i></a> to be called on the event(s) defined in
<a href="#DrawObjectEvent"><i><code><span data-if="hdevelop" style="display:inline">DrawObjectEvent</span><span data-if="c" style="display:none">DrawObjectEvent</span><span data-if="cpp" style="display:none">DrawObjectEvent</span><span data-if="com" style="display:none">DrawObjectEvent</span><span data-if="dotnet" style="display:none">drawObjectEvent</span><span data-if="python" style="display:none">draw_object_event</span></code></i></a> to the drawing object <a href="#DrawHandle"><i><code><span data-if="hdevelop" style="display:inline">DrawHandle</span><span data-if="c" style="display:none">DrawHandle</span><span data-if="cpp" style="display:none">DrawHandle</span><span data-if="com" style="display:none">DrawHandle</span><span data-if="dotnet" style="display:none">drawHandle</span><span data-if="python" style="display:none">draw_handle</span></code></i></a>.
An event is an action, i.e., a user interaction with the
mouse or a call to a HALCON operator, e.g.,
<a href="attach_drawing_object_to_window.html"><code><span data-if="hdevelop" style="display:inline">attach_drawing_object_to_window</span><span data-if="c" style="display:none">attach_drawing_object_to_window</span><span data-if="cpp" style="display:none">AttachDrawingObjectToWindow</span><span data-if="com" style="display:none">AttachDrawingObjectToWindow</span><span data-if="dotnet" style="display:none">AttachDrawingObjectToWindow</span><span data-if="python" style="display:none">attach_drawing_object_to_window</span></code></a>), that changes the current state of a
given drawing object. 该算子 <code><span data-if="hdevelop" style="display:inline">set_drawing_object_callback</span><span data-if="c" style="display:none">set_drawing_object_callback</span><span data-if="cpp" style="display:none">SetDrawingObjectCallback</span><span data-if="com" style="display:none">SetDrawingObjectCallback</span><span data-if="dotnet" style="display:none">SetDrawingObjectCallback</span><span data-if="python" style="display:none">set_drawing_object_callback</span></code> allows
to define how to react to those events.
</p>
<p>The following predefined events are available:
</p>
<dl class="generic">

<dt><b><i><span data-if="hdevelop" style="display:inline">'on_attach'</span><span data-if="c" style="display:none">"on_attach"</span><span data-if="cpp" style="display:none">"on_attach"</span><span data-if="com" style="display:none">"on_attach"</span><span data-if="dotnet" style="display:none">"on_attach"</span><span data-if="python" style="display:none">"on_attach"</span></i></b></dt>
<dd><p>

The corresponding callback will be called right after the object
has been attached to the HALCON window and is ready for interaction.
</p></dd>

<dt><b><i><span data-if="hdevelop" style="display:inline">'on_detach'</span><span data-if="c" style="display:none">"on_detach"</span><span data-if="cpp" style="display:none">"on_detach"</span><span data-if="com" style="display:none">"on_detach"</span><span data-if="dotnet" style="display:none">"on_detach"</span><span data-if="python" style="display:none">"on_detach"</span></i></b></dt>
<dd><p>

The corresponding callback will be called right after the object
has been detached from the window and is no longer available for interaction.
</p></dd>

<dt><b><i><span data-if="hdevelop" style="display:inline">'on_drag'</span><span data-if="c" style="display:none">"on_drag"</span><span data-if="cpp" style="display:none">"on_drag"</span><span data-if="com" style="display:none">"on_drag"</span><span data-if="dotnet" style="display:none">"on_drag"</span><span data-if="python" style="display:none">"on_drag"</span></i></b></dt>
<dd><p>

The corresponding callback will be called right after the object
has been dragged with mouse interaction.
</p></dd>

<dt><b><i><span data-if="hdevelop" style="display:inline">'on_resize'</span><span data-if="c" style="display:none">"on_resize"</span><span data-if="cpp" style="display:none">"on_resize"</span><span data-if="com" style="display:none">"on_resize"</span><span data-if="dotnet" style="display:none">"on_resize"</span><span data-if="python" style="display:none">"on_resize"</span></i></b></dt>
<dd><p>

The corresponding callback will be called right after the object
has been resized with mouse interaction.
</p></dd>

<dt><b><i><span data-if="hdevelop" style="display:inline">'on_select'</span><span data-if="c" style="display:none">"on_select"</span><span data-if="cpp" style="display:none">"on_select"</span><span data-if="com" style="display:none">"on_select"</span><span data-if="dotnet" style="display:none">"on_select"</span><span data-if="python" style="display:none">"on_select"</span></i></b></dt>
<dd><p>

The corresponding callback will be called right after the object
has been selected with mouse interaction.
</p></dd>
</dl>
<p>It is possible to specify a particular callback for each desired event.
Then the input parameters <a href="#DrawObjectEvent"><i><code><span data-if="hdevelop" style="display:inline">DrawObjectEvent</span><span data-if="c" style="display:none">DrawObjectEvent</span><span data-if="cpp" style="display:none">DrawObjectEvent</span><span data-if="com" style="display:none">DrawObjectEvent</span><span data-if="dotnet" style="display:none">drawObjectEvent</span><span data-if="python" style="display:none">draw_object_event</span></code></i></a> and <a href="#CallbackFunction"><i><code><span data-if="hdevelop" style="display:inline">CallbackFunction</span><span data-if="c" style="display:none">CallbackFunction</span><span data-if="cpp" style="display:none">CallbackFunction</span><span data-if="com" style="display:none">CallbackFunction</span><span data-if="dotnet" style="display:none">callbackFunction</span><span data-if="python" style="display:none">callback_function</span></code></i></a>
must have the same length. It is also possible to use the same callback
for different events. Then <a href="#DrawObjectEvent"><i><code><span data-if="hdevelop" style="display:inline">DrawObjectEvent</span><span data-if="c" style="display:none">DrawObjectEvent</span><span data-if="cpp" style="display:none">DrawObjectEvent</span><span data-if="com" style="display:none">DrawObjectEvent</span><span data-if="dotnet" style="display:none">drawObjectEvent</span><span data-if="python" style="display:none">draw_object_event</span></code></i></a> has an
arbitrary length and <a href="#CallbackFunction"><i><code><span data-if="hdevelop" style="display:inline">CallbackFunction</span><span data-if="c" style="display:none">CallbackFunction</span><span data-if="cpp" style="display:none">CallbackFunction</span><span data-if="com" style="display:none">CallbackFunction</span><span data-if="dotnet" style="display:none">callbackFunction</span><span data-if="python" style="display:none">callback_function</span></code></i></a> contains one single value.
</p>
<p>The callback is an integer of long type containing a pointer to a C function
with the following signature:
</p>
<p>Herror HDrawObjCallback(long DrawHandle, long WindowHandle, char *type)
</p>
<p>On Windows systems, the __stdcall naming convention is used:
</p>
<p>Herror (__stdcall HDrawObjCallback)(long DrawHandle, long WindowHandle, char* type)
</p>
<p>The first parameter of the callback function contains the handle to the draw
object that generated the event, the second one contains the handle of the
window where the interaction took place.  Finally, the third parameter
indicates which event occurred.
</p>
<h2 id="sec_attention">注意</h2>
<p>No graphical operator should be called within the callback, like for example
<a href="disp_obj.html"><code><span data-if="hdevelop" style="display:inline">disp_obj</span><span data-if="c" style="display:none">disp_obj</span><span data-if="cpp" style="display:none">DispObj</span><span data-if="com" style="display:none">DispObj</span><span data-if="dotnet" style="display:none">DispObj</span><span data-if="python" style="display:none">disp_obj</span></code></a>, for otherwise a deadlock may occur.</p>
<h2 id="sec_execution">运行信息</h2>
<ul>
  <li>多线程类型:可重入(与非独占操作符并行运行)。</li>
<li>多线程作用域:全局(可以从任何线程调用)。</li>
  <li>未经并行化处理。</li>
</ul>
<h2 id="sec_parameters">参数表</h2>
  <div class="par">
<div class="parhead">
<span id="DrawHandle" class="parname"><b><code><span data-if="hdevelop" style="display:inline">DrawHandle</span><span data-if="c" style="display:none">DrawHandle</span><span data-if="cpp" style="display:none">DrawHandle</span><span data-if="com" style="display:none">DrawHandle</span><span data-if="dotnet" style="display:none">drawHandle</span><span data-if="python" style="display:none">draw_handle</span></code></b> (input_control)  </span><span>drawing_object <code>→</code> <span data-if="dotnet" style="display:none"><a href="HDrawingObject.html">HDrawingObject</a>, </span><span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">HHandle</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (handle)</span><span data-if="dotnet" style="display:none"> (<i>IntPtr</i>)</span><span data-if="cpp" style="display:none"> (<i>HHandle</i>)</span><span data-if="c" style="display:none"> (<i>handle</i>)</span></span>
</div>
<p class="pardesc">Handle of the drawing object.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="DrawObjectEvent" class="parname"><b><code><span data-if="hdevelop" style="display:inline">DrawObjectEvent</span><span data-if="c" style="display:none">DrawObjectEvent</span><span data-if="cpp" style="display:none">DrawObjectEvent</span><span data-if="com" style="display:none">DrawObjectEvent</span><span data-if="dotnet" style="display:none">drawObjectEvent</span><span data-if="python" style="display:none">draw_object_event</span></code></b> (input_control)  </span><span>string(-array) <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">MaybeSequence[str]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (string)</span><span data-if="dotnet" style="display:none"> (<i>string</i>)</span><span data-if="cpp" style="display:none"> (<i>HString</i>)</span><span data-if="c" style="display:none"> (<i>char*</i>)</span></span>
</div>
<p class="pardesc">Events to be captured.</p>
<p class="pardesc"><span class="parcat">Suggested values:
      </span><span data-if="hdevelop" style="display:inline">'on_resize'</span><span data-if="c" style="display:none">"on_resize"</span><span data-if="cpp" style="display:none">"on_resize"</span><span data-if="com" style="display:none">"on_resize"</span><span data-if="dotnet" style="display:none">"on_resize"</span><span data-if="python" style="display:none">"on_resize"</span>, <span data-if="hdevelop" style="display:inline">'on_drag'</span><span data-if="c" style="display:none">"on_drag"</span><span data-if="cpp" style="display:none">"on_drag"</span><span data-if="com" style="display:none">"on_drag"</span><span data-if="dotnet" style="display:none">"on_drag"</span><span data-if="python" style="display:none">"on_drag"</span>, <span data-if="hdevelop" style="display:inline">'on_attach'</span><span data-if="c" style="display:none">"on_attach"</span><span data-if="cpp" style="display:none">"on_attach"</span><span data-if="com" style="display:none">"on_attach"</span><span data-if="dotnet" style="display:none">"on_attach"</span><span data-if="python" style="display:none">"on_attach"</span>, <span data-if="hdevelop" style="display:inline">'on_detach'</span><span data-if="c" style="display:none">"on_detach"</span><span data-if="cpp" style="display:none">"on_detach"</span><span data-if="com" style="display:none">"on_detach"</span><span data-if="dotnet" style="display:none">"on_detach"</span><span data-if="python" style="display:none">"on_detach"</span>, <span data-if="hdevelop" style="display:inline">'on_select'</span><span data-if="c" style="display:none">"on_select"</span><span data-if="cpp" style="display:none">"on_select"</span><span data-if="com" style="display:none">"on_select"</span><span data-if="dotnet" style="display:none">"on_select"</span><span data-if="python" style="display:none">"on_select"</span></p>
</div>
  <div class="par">
<div class="parhead">
<span id="CallbackFunction" class="parname"><b><code><span data-if="hdevelop" style="display:inline">CallbackFunction</span><span data-if="c" style="display:none">CallbackFunction</span><span data-if="cpp" style="display:none">CallbackFunction</span><span data-if="com" style="display:none">CallbackFunction</span><span data-if="dotnet" style="display:none">callbackFunction</span><span data-if="python" style="display:none">callback_function</span></code></b> (input_control)  </span><span>pointer(-array) <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">MaybeSequence[int]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (integer)</span><span data-if="dotnet" style="display:none"> (<i>IntPtr</i>)</span><span data-if="cpp" style="display:none"> (<i>Hlong</i>)</span><span data-if="c" style="display:none"> (<i>Hlong</i>)</span></span>
</div>
<p class="pardesc">Callback functions.</p>
</div>
<div data-if="hdevelop" style="display:inline">
</div>
<div data-if="c" style="display:none">
</div>
<div data-if="cpp" style="display:none">
</div>
<div data-if="com" style="display:none">
</div>
<div data-if="dotnet" style="display:none">
</div>
<h2 id="sec_result">结果</h2>
<p><code><span data-if="hdevelop" style="display:inline">set_drawing_object_callback</span><span data-if="c" style="display:none">set_drawing_object_callback</span><span data-if="cpp" style="display:none">SetDrawingObjectCallback</span><span data-if="com" style="display:none">SetDrawingObjectCallback</span><span data-if="dotnet" style="display:none">SetDrawingObjectCallback</span><span data-if="python" style="display:none">set_drawing_object_callback</span></code> returns <TT>2</TT> (
      <TT>H_MSG_TRUE</TT>)
    , if <a href="#DrawHandle"><i><code><span data-if="hdevelop" style="display:inline">DrawHandle</span><span data-if="c" style="display:none">DrawHandle</span><span data-if="cpp" style="display:none">DrawHandle</span><span data-if="com" style="display:none">DrawHandle</span><span data-if="dotnet" style="display:none">drawHandle</span><span data-if="python" style="display:none">draw_handle</span></code></i></a> is valid.
Otherwise an exception is raised.</p>
<h2 id="sec_predecessors">可能的前置算子</h2>
<p>
<code><a href="attach_drawing_object_to_window.html"><span data-if="hdevelop" style="display:inline">attach_drawing_object_to_window</span><span data-if="c" style="display:none">attach_drawing_object_to_window</span><span data-if="cpp" style="display:none">AttachDrawingObjectToWindow</span><span data-if="com" style="display:none">AttachDrawingObjectToWindow</span><span data-if="dotnet" style="display:none">AttachDrawingObjectToWindow</span><span data-if="python" style="display:none">attach_drawing_object_to_window</span></a></code>
</p>
<h2 id="sec_successors">可能的后置算子</h2>
<p>
<code><a href="close_window.html"><span data-if="hdevelop" style="display:inline">close_window</span><span data-if="c" style="display:none">close_window</span><span data-if="cpp" style="display:none">CloseWindow</span><span data-if="com" style="display:none">CloseWindow</span><span data-if="dotnet" style="display:none">CloseWindow</span><span data-if="python" style="display:none">close_window</span></a></code>, 
<code><a href="clear_drawing_object.html"><span data-if="hdevelop" style="display:inline">clear_drawing_object</span><span data-if="c" style="display:none">clear_drawing_object</span><span data-if="cpp" style="display:none">ClearDrawingObject</span><span data-if="com" style="display:none">ClearDrawingObject</span><span data-if="dotnet" style="display:none">ClearDrawingObject</span><span data-if="python" style="display:none">clear_drawing_object</span></a></code>, 
<code><a href="detach_drawing_object_from_window.html"><span data-if="hdevelop" style="display:inline">detach_drawing_object_from_window</span><span data-if="c" style="display:none">detach_drawing_object_from_window</span><span data-if="cpp" style="display:none">DetachDrawingObjectFromWindow</span><span data-if="com" style="display:none">DetachDrawingObjectFromWindow</span><span data-if="dotnet" style="display:none">DetachDrawingObjectFromWindow</span><span data-if="python" style="display:none">detach_drawing_object_from_window</span></a></code>, 
<code><a href="get_drawing_object_iconic.html"><span data-if="hdevelop" style="display:inline">get_drawing_object_iconic</span><span data-if="c" style="display:none">get_drawing_object_iconic</span><span data-if="cpp" style="display:none">GetDrawingObjectIconic</span><span data-if="com" style="display:none">GetDrawingObjectIconic</span><span data-if="dotnet" style="display:none">GetDrawingObjectIconic</span><span data-if="python" style="display:none">get_drawing_object_iconic</span></a></code>, 
<code><a href="get_drawing_object_params.html"><span data-if="hdevelop" style="display:inline">get_drawing_object_params</span><span data-if="c" style="display:none">get_drawing_object_params</span><span data-if="cpp" style="display:none">GetDrawingObjectParams</span><span data-if="com" style="display:none">GetDrawingObjectParams</span><span data-if="dotnet" style="display:none">GetDrawingObjectParams</span><span data-if="python" style="display:none">get_drawing_object_params</span></a></code>
</p>
<h2 id="sec_see">参考其它</h2>
<p>
<code><a href="create_drawing_object_rectangle1.html"><span data-if="hdevelop" style="display:inline">create_drawing_object_rectangle1</span><span data-if="c" style="display:none">create_drawing_object_rectangle1</span><span data-if="cpp" style="display:none">CreateDrawingObjectRectangle1</span><span data-if="com" style="display:none">CreateDrawingObjectRectangle1</span><span data-if="dotnet" style="display:none">CreateDrawingObjectRectangle1</span><span data-if="python" style="display:none">create_drawing_object_rectangle1</span></a></code>, 
<code><a href="attach_drawing_object_to_window.html"><span data-if="hdevelop" style="display:inline">attach_drawing_object_to_window</span><span data-if="c" style="display:none">attach_drawing_object_to_window</span><span data-if="cpp" style="display:none">AttachDrawingObjectToWindow</span><span data-if="com" style="display:none">AttachDrawingObjectToWindow</span><span data-if="dotnet" style="display:none">AttachDrawingObjectToWindow</span><span data-if="python" style="display:none">attach_drawing_object_to_window</span></a></code>, 
<code><a href="detach_drawing_object_from_window.html"><span data-if="hdevelop" style="display:inline">detach_drawing_object_from_window</span><span data-if="c" style="display:none">detach_drawing_object_from_window</span><span data-if="cpp" style="display:none">DetachDrawingObjectFromWindow</span><span data-if="com" style="display:none">DetachDrawingObjectFromWindow</span><span data-if="dotnet" style="display:none">DetachDrawingObjectFromWindow</span><span data-if="python" style="display:none">detach_drawing_object_from_window</span></a></code>
</p>
<h2 id="sec_module">模块</h2>
<p>
Foundation</p>
<!--OP_REF_FOOTER_START-->
<hr>
<div class="indexlink">
<a href="index_classes.html"><span data-if="dotnet" style="display:none;">类别</span><span data-if="cpp" style="display:none;">类别</span></a><span data-if="dotnet" style="display:none;"> | </span><span data-if="cpp" style="display:none;"> | </span><a href="index_by_name.html">算子列表</a>
</div>
<div class="footer">
<div class="copyright">HALCON算子参考手册 Copyright © 2015-2023 51Halcon</div>
</div>
</div>
</body>
</html>
